/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

'use strict';
(function(global) {
const log: string[] = [];
const logArgs: any[][] = [];
const wtfMock = {
  log: log,
  logArgs: logArgs,
  reset: function() {
    log.length = 0;
    logArgs.length = 0;
  },
  trace: {
    leaveScope: function(scope: any, returnValue: any) {
      return scope(returnValue);
    },
    beginTimeRange: function(type: any, action: any) {
      logArgs.push([]);
      log.push('>>> ' + type + '[' + action + ']');
      return function() {
        logArgs.push([]);
        log.push('<<< ' + type);
      };
    },
    endTimeRange: function(range: Function) {
      range();
    },
    events: {
      createScope: function(signature: string, flags: any) {
        const parts = signature.split('(');
        const name = parts[0];
        return function scopeFn() {
          const args = [];
          for (let i = arguments.length - 1; i >= 0; i--) {
            const arg = arguments[i];
            if (arg !== undefined) {
              args.unshift(__stringify(arg));
            }
          }
          log.push('> ' + name + '(' + args.join(', ') + ')');
          logArgs.push(args);
          return function(retValue: any) {
            log.push('< ' + name + (retValue == undefined ? '' : ' => ' + retValue));
            logArgs.push(retValue);
            return retValue;
          };
        };
      },
      createInstance: function(signature: string, flags: any) {
        const parts = signature.split('(');
        const name = parts[0];
        return function eventFn() {
          const args = [];
          for (let i = arguments.length - 1; i >= 0; i--) {
            const arg = arguments[i];
            if (arg !== undefined) {
              args.unshift(__stringify(arg));
            }
          }
          log.push('# ' + name + '(' + args.join(', ') + ')');
          logArgs.push(args);
        };
      }
    }
  }
};

function __stringify(obj: any): string {
  let str = typeof obj == 'string' || !obj ? JSON.stringify(obj) : obj.toString();
  if (str == '[object Arguments]') {
    str = JSON.stringify(Array.prototype.slice.call(obj));
  } else if (str == '[object Object]') {
    str = JSON.stringify(obj);
  }
  return str;
}

beforeEach(function() {
  wtfMock.reset();
});

(<any>global).wtfMock = wtfMock;
(<any>global).wtf = wtfMock;
})(typeof window === 'object' && window || typeof self === 'object' && self || global);

declare const wtfMock: any;
